One often writes G = ( U , V , E ) (\displaystyle G=(U,V,E)) to denote a bipartite graph whose partition has the parts U (\displaystyle U) and V (\displaystyle V) , with E (\displaystyle E) denoting the edges of the graph. If a bipartite graph is not connected, it may have more than one bipartition; in this case, the ( U , V , E ) (\displaystyle (U,V,E)) notation is helpful in specifying one particular bipartition that may be of importance in an application. If U = V (\displaystyle U = V ) , that is, if the two subsets have equal cardinality, then G (\displaystyle G) is called a balanced bipartite graph. If all vertices on the same side of the bipartition have the same degree, then G (\displaystyle G) is called biregular.
does a bipartite graph have to be connected?
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Answer: no


Romaine or cos lettuce (Lactuca sativa L. var. longifolia) is a variety of lettuce that grows in a tall head of sturdy dark green leaves with firm ribs down their centers. Unlike most lettuces, it is tolerant of heat. It is more nutritious than iceberg lettuce. In North America, romaine is sold as whole heads or as ``hearts'' that have had the outer leaves removed and are often packaged together.
is romaine hearts the same as romaine lettuce?
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Answer: yes


Dermatophagia (from Ancient Greek δέρμα - skin - and φαγεία - eating) is a compulsion disorder of gnawing, biting or eating one's own skin, most commonly at the fingers. People with dermatophagia typically bite the skin around the nails, leading to bleeding and discoloration over time. Some people also bite on their skin on their finger knuckles which can lead to pain and bleeding just by moving their fingers. Some usually consume the flesh during an episode. Contemporary research suggests a link between impulse control disorders and obsessive--compulsive disorders, and this may be addressed in the DSM-5, published in May 2013. Further information on OCD, other anxiety disorders, and dermatophagia and other impulse-control disorders can be found in the DSM-IV TR.
is it bad to bite the skin off your fingers?
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Answer:
yes